Download Java EE 6 Enterprise Architect Certified Master.1z0-807.Train4Sure.2018-10-26.48q.vcex

Vendor: Oracle
Exam Code: 1z0-807
Exam Name: Java EE 6 Enterprise Architect Certified Master
Date: Oct 26, 2018
File Size: 35 KB
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Demo Questions

Question 1
You have been recruited by an online retailer of footwear to conduct a review of their online systems. Your primary Finding is that the development team has 
implemented duplicated complex business logic as Java scripts directly into the JSPs, causing performance, scalability, and maintainability issues. 
Which two design patterns would you select to improve the current code base? 
  1. View Helper
  2. From Controller
  3. Composite View
  4. Service-to-Worker
  5. Business Delegate
Correct answer: BD
Question 2
A successful web application is used by over two hundred thousand users. Due to this substantial load, the database is over bridged and fails frequently. All data, included critical user records and temporary session data, is stored in the database. Because of resource constraints, a new database system cannot be installed. 
Which change will reduce the load on the database?
  1. Creating more entity beans to optimize interaction wild the database
  2. Refactoring the web application to use DAOs to communicate with the database
  3. Refactoring the web application to store temporary session data on the web servers
  4. Adding more web servers to the web tier to distribute the load and reduce the number of transactions on the database.
Correct answer: C
Question 3
You are using an open source integration framework in your project. However, key interfaces do not explicitly define several strange conditions you have repeatedly seen while testing. 
Which option is the name given to the anti pattern described above?
  1. Composite View
  2. Leaky Abstraction
  3. Asynchronous Interaction
  4. Golden Hammer
Correct answer: B
Explanation:
All non-trivial abstractions, to some degree, are leaky. An abstraction that works most of the time, but where a detail of the underlying complexity cannot be ignored, thus leaking complexity out of the abstraction back into the software that uses the abstraction.
All non-trivial abstractions, to some degree, are leaky. 
An abstraction that works most of the time, but where a detail of the underlying complexity cannot be ignored, thus leaking complexity out of the abstraction back into the software that uses the abstraction.
Question 4
Which two statements are true about security strategies at the message-level?
  1. Messages are secured during transport and after arrival at their destination
  2. Each portion of a compound message is secured.
  3. SSL is required to ensure authenticity, integrity, and confidentiality.
  4. Message attachments are secured without the need for a dedicated API.
  5. Security is dependent on the application environment or the transport protocol.
Correct answer: AC
Explanation:
Question 5
Which two features are supported by the Java Authentication and Authorization Service (JAAS) API?
  1. Single sign on
  2. Secure network connections
  3. Configurable access control policies
  4. Web services security
  5. Message encryption and key generation
Correct answer: AC
Question 6
Your development team wants to use Google Guice. A previous architect assigned this request a low priority, citing the complexity of integration and no compelling benefits statements from the requesting team. 
The team claims that their colleagues have achieved the integration using a pattern. This pattern reduced the level of difficulty and risk and did not require vendor support. 
Which pattern fits this description?
  1. Context Holder
  2. Service Starter
  3. Dependency Injection Extender
  4. Bean Locator
Correct answer: C
Explanation:
Reference: https://code.google.com/p/peaberry/
Reference: https://code.google.com/p/peaberry/
Question 7
Which two statements are true about Java integration technologies?
  1. Remote Method Invocation (RMI) helps to connect subsystems in a loosely coupled manner.
  2. Java Message Service (JMS) helps in synchronous messaging between Java and non-Java systems.
  3. JMS helps to broadcast messages to multiple Java-based receivers.
  4. Java Connector Architecture (JCA) helps to integrate with heterogeneous legacy enterprise information systems.
Correct answer: CD
Question 8
Which two statements describe the contact between an Enterprise JavaBeans (EJB) container and the EJBs that it hosts?
  1. The container provides automatic logging of all exceptions and errors generated by EJB code.
  2. The container provides a transparent scaling mechanism to handle spikes in demand. 
  3. An EJB can extend its services, such as security, to improve performance.
  4. The container has a well defined lifecycle model for each EJB type.
Correct answer: BD
Question 9
A manufacturing company has a large investment in a legacy Inventory Management System (IMS) developed with third-party technologies. You have been asked 
to design a Java EE application that interacts with it. 
You would like to ensure the following:
  • Minimal application code is required to parse the communication messages. 
  • Communication is asynchronous and stateless. 
  • Performance import of the existing system is minimal. 
Which two technologies combined would meet these requirements?
  1. XML
  2. JSON
  3. RMI
  4. JAX-RS
  5. JAX-WS
Correct answer: BD
Question 10
Which are the objectives of the Strategy pattern? (Choose Two)
  1. To provide a way to configure a class with one of many behaviors
  2. To define an object that encapsulates how a set of objects interacts
  3. To define the skeleton of an algorithm, deferring some steps to subclasses
  4. To decouple an abstraction horn its implementation so that the two can vary independently
  5. To define a family of algorithms, encapsulate each one, and make them interchangeable
  6. To allow subclasses to redefine certain steps of an algorithm without changing the algorithm's structure
Correct answer: AE
Explanation:
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